Banned

hi, i worked out ill be getting the pioneer sv50's to go with my vsxd814 next week which is a 5.1 package
im also planning to buy an extra 2 so i can have 7.1 setup and wondering weather to either go for these floorstanders http://www.avland.co.uk/pioneer/sh310/index.htm which are £140 or for £69 i could get an extra 2 satellite speakers that match the sv50's i think, if you could kinda help me on a decision would be appriciated
im stuck on a decision as you can see the sv50 can be found here http://www.avland.co.uk/pioneer/sv50/index.htm and like it says under optional products...